I measured my feet, checked my size on a chart and bought a pair of high heels. Apparently women’s feet are thinner than men’s, but I never thought they were that much thinner. Shoe fits but it hurts.
Foot measures are 27 cm long and 10 cm wide across the ball (10.62’’ long and 3.93’’ in imperial)
I compared the heels to my unisex sneakers: sneakers are 11 cm (4.33’‘) wide across the ball and the heels 7.5 cm (2.95’').
I don’t believe any heel brand makes 10 cm (3.93’') wide heels.
People have recommended me to go a bigger size, but a larger size is going to be longer and will fall off.
I’m lucky in that about 1/4 of women’s shoes in my size actually fit my feet. But I also have had a number of heels where I helped myself out by buying them a tiny bit too large and then wearing 2-4 pairs of socks.